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Complete combustion of 7.70 g of a hydrocarbon produced 24.8 g of CO2 and 8.44 g of H2O. What is the empirical formula for the hydrocarbon?
Calculate the amount of heat (cal) necessary to convert 34g of ice at -3oC into liquid water at 25oC.
Europium crystallizes in a body-centered cubic lattice (the Eu atoms occupy only the lattice points).The density of Eu is 5.26 g/cm3. Calculate the unit cell edge length in pm.
How many grams of solid sodium phosphate, Na3PO4, are needed to prepare exactly 250ml of a 0.500M Na+ solution?
Ammonia (NH3) is widely used as a fertilizer and in many household cleaners. How much ammonia is produced when 6.32 mol of hydrogen gas react with an excess of nitrogen gas?Answer in units of mol
What is the pH of a solution containing 0.001 M NaHCO3 and 0.002 M NH3? You may assume that both the carbonic acid system
Calculate the pH of a solution made by adding 16.0 g of sodium formate
Urea (NH2CONH2) an important nitrogen fertilizer is produced industrially by the reaction 2NH3(g)+CO2(g)--->NH2CONH2(aq)+ H2O(l) given that ?G^degree = -13.6KJ, calculate ?Gat 298K for the following sets of conditions
Calculate the pH of each of the following solutions. (a) 0.500 M HONH2 (Kb = 1.1 10-8) (b) 0.500 M HONH3Cl
A red laser pointer emits light with a wavelength of 660. What is the frequency of this light? 2.What is the energy of one of these photons?
A solution is prepared by dissolving 13.3 g ammonium sulfate in enough water to make 100.0 mL of stock solution. A 11.50 mL sample of this stock solution
A 325-mL sample of solution contains 25.3 g of CaCl2 calculate the molar concentration of Cl in this solution
To what volume should you dilute 95mL of a 12.0M H2SO4 solution to obtain 1.80M H2SO4 solution
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